Letter Opener Design = ? military dagger / knife / bayonette ? (Metal) See Photo

Description

AS SHOWN:  Letter Opener Design = ? military dagger / knife / bayonette ? (Metal) See Photos
Only one of this specific type on EBAY at time of listing?
Vintage /     -  -    Relatively heavy metal = almost 3 ounces   I did not see any plastic in construction.
Please view photos to detrmine if this item is right for you.  Thanks for looking.